<!DOCTYPE html>
<html><head lang="en">
<meta charset="UTF-8">
<title>我的页面</title>
</head>
<body>
</body>
</html>
<script>
console.log(document.title); // 访问标题标签
console.log(document.head);
console.log(document.body);
console.log(document.documentElement);
</script>